کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
979354 933339 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-hydrodynamic modes and general equations of state in lattice Boltzmann equations
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Non-hydrodynamic modes and general equations of state in lattice Boltzmann equations
چکیده انگلیسی

The lattice Boltzmann equation is commonly used to simulate fluids with isothermal equations of state in a weakly compressible limit, and intended to approximate solutions of the incompressible Navier–Stokes equations. Due to symmetry requirements there are usually more degrees of freedom in the equilibrium distributions than there are constraints imposed by the need to recover the Navier–Stokes equations in a slowly varying limit. We construct equilibria for general barotropic fluids, where pressure depends only upon density, using the two-dimensional, nine velocity (D2Q9) and one-dimensional, five velocity (D1Q5) lattices, showing that one otherwise arbitrary function in the equilibria must be chosen to suppress instability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 362, Issue 1, 15 March 2006, Pages 132–138
نویسندگان
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